Apparatus for the manufacture of sheets of corrugated board of variable size

Abstract

An apparatus for the manufacture of sheets of corrugated board of variable size comprises a cross cutter for severing the entire web of corrugated board disposed, in the conveying direction of a web of corrugated board, downstream of at least one longitudinal cutting arrangement, of cutting devices for cutting lateral margins and of discharge devices for the margins cut off, and upstream of at least one cross cutting arrangement for cutting sheets of corrugated board.

What is claimed is: 
     
       1. An apparatus for the manufacture of sheet of corrugated board of variable size, comprising at least one longitudinal cutting arrangement (5, 6) having longitudinal cutters (8) adjustable at right angles to a conveying direction (1) of a nondivided web (2) of corrugated board for cutting sectional webs (19a to 19d; 22a to 22d) of corrugated board of differing format width,   cutting devices (10, 11) adjustable at right angles to the conveying direction (1) of said web (2) of corrugated board for cutting lateral margins (12, 13) of said web (2) of corrugated board,   discharge devices (14, 15) for said lateral margins (12, 13) and   at least one cross cutting arrangement (33) for cutting sheets of corrugated board from said sectional webs (19a to 19d; 22a to 22d) of corrugated board,   wherein, seen in the conveying direction (1), a cross cutter (27) for severing all said sectional webs (19a to 19d; 22a to 22d) of corrugated board and not said lateral margins is disposed downstream of the at least one longitudinal cutting arrangement (5, 6), the cutting devices (10, 11) for cutting lateral margins (12, 13) and the discharge devices (14, 15) and upstream of the at least one cross cutting arrangement (33) for the cutting of sheets of corrugated board,   wherein in the conveying direction (1), the cross cutter (27) is followed by a switch (30) for distributing sectional webs (19a to 19d; 22a to 22d) of corrugated board of differing format lengths, said switch (30) being followed by the cross cutting arrangement which includes a duplex cross cutting arrangement (33) for the cutting of sheets of corrugated board from the sectional webs (19a to 19d; 22a to 22d) of corrugated board,   wherein seen in the conveying direction (1) a sheet sluice (28), by means of which a portion (24) of change of format width of said web (2) of corrugated board is cut out of said web (2) by means of two cuts of said cross cutter (27), is discarded and carried away and is disposed downstream of said cross cutter (27) and upstream of the switch (30) for distributing sectional webs (19a to 19d; 22a to 22d) of corrugated board of different format lengths,   wherein said apparatus does not include a cross cutter for said lateral margins.   
     
     
       2. An apparatus according to claim 1, wherein the cutting devices (10, 11) for the cutting of the margins (12, 13) of the web (2) of corrugated board are displaceable at right angles to the conveying direction (1) of the web (2) of corrugated board independently of the longitudinal cutters (8) for cutting the sectional webs (19a to 19d; 22a to 22d) of corrugated board and wherein they are permanently in engagement with the web (2) of corrugated board at least during the change of format width. 
     
     
       3. An apparatus according to claim 1, wherein the discharge devices (14, 15) for the margins (12, 13) are displaceable at right angles to the conveying direction (1) of the web (2) of corrugated board and wherein one cutting device of the cutting devices (10, 11) at a time for cutting a margin (12, 13) is coupled with a discharge device (14, 15). 
     
     
       4. An apparatus according to claim 3, wherein said one cutting device (10, 11) at a time for cutting a margin (12, 13) is mechanically coupled with a discharge device.